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Propagation equations for test bodies with spin and rotation in theories of gravity with torsion

- Philip B. Yasskin, W. Stoeger
- Physics
- 15 April 1980

We generalize the Papapetrou equations by deriving propagation equations for the energy-momentum and angular momentum of a test body which has both elementary-particle spin and macroscopic rotation… Expand

On the determination of Cauchy surfaces from intrinsic properties

- R. Budic, J. Isenberg, L. Lindblom, Philip B. Yasskin
- Mathematics, Physics
- 1 August 1977

We consider the problem of determining from intrinsic properties whether or not a given spacelike surface is a Cauchy surface. We present three results relevant to this question. First, we derive… Expand

Solutions for gravity coupled to massless gauge fields

- Philip B. Yasskin
- Physics
- 15 October 1975

An explicit procedure is presented so that from each solution of the coupled Einstein-Maxwell equations for gravity and source-free electromagnetic fields, one can construct a set of solutions of the… Expand

Birkhoff theorem for an R+R 2 theory of gravity with torsion

- S. Ramaswamy, Philip B. Yasskin
- Physics
- 15 April 1979

We investigate the gravitational Lagrangian ${L}_{G}=(\frac{{c}^{4}}{16\ensuremath{\pi}G})R\ensuremath{-}(\frac{\ensuremath{\hbar}c}{16\ensuremath{\pi}{\ensuremath{\alpha}}_{G}})… Expand

Product yield for ECAE processing

- R. E. Barber, T. Dudo, Philip B. Yasskin, K. Hartwig
- Materials Science
- 1 September 2004

Abstract The fully worked volume and shape of bars processed via equal channel angular extrusion through a 90 die and different multipass routes are reported. Results are given for square… Expand

Non-self-dual gauge fields

- J. Isenberg, Philip B. Yasskin, P. Green
- Physics
- 9 October 1978

Abstract The Ward construction is generalized to non-self-dual gauge fields. Reality and currentless conditions are specified.

Non-self-dual nonlinear gravitons

- Philip B. Yasskin, J. Isenberg
- Physics
- 1 July 1982

Penrose has given a twistor description of all self-dual complex Riemannian space-times. We modify his construction to characterize all complex Riemannian space-times and all complex teleparallel… Expand

All torsion-free spherical vacuum solutions of the quadratic Poincaré gauge theory of gravity

- P. Baekler, Philip B. Yasskin
- Physics
- 1 December 1984

We find all torsion-free, spherically symmetric, vacuum solutions to the theory of gravity recently proposed by Hehl, Ne'eman, Nitsch, and von der Heyde. There are three classes of solutions: (A) the… Expand

The sounds of science—a symphony for many instruments and voices

- G. Alexander, R. Allen, +15 authors Suzy Lidstrom
- Physics, Sociology
- 5 July 2019

Sounds of Science is the first movement of a symphony for many (scientific) instruments and voices, united in celebration of the frontiers of science and intended for a general audience. John… Expand

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